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Yes if I had the source code and related documents.
If it is possible with an agreement with all stakeholders and following proper Management of Change process approval. I will agree with approprite process.
By following the companu procedures and policies, yes it is possible to make any desired changes to the site.
Making sure to add comment ressources to each modification and explain the impact of each of them are the most important things to do in order to be able to roll back properly to some state and allows the next developper to be able to know each step of the modification and maintain it properly.
Yes, If you have the source code or if you have access to the CMS.
Yes. It is possible with an agreement with all stakeholders and following proper Management of Change process approval.
You need to follow your compnay procedures and policies also in this case with the approvals of concerned.
The Variacne should be captured in the variance regsiter and all the Risk-Quality issues to be verified in detail and taekn care whle making the execution plan.
Yes, Depends upon the type of change request & coupling of existing code.
It depends - The changes requested will be taken as an enhancement request and then the project starts with the Analysis phase, then design, development, testing and implementation phases.
A valid requirement will be implemented as part of enhancements
Once the site is delivered and hosted - the updates can be done in the development environment and completely tested and after getting the sign-off from the client it can be hosted to live.
Yes, it is very much possible if you've got the source code of the respective website.
Yes you can change it depend on Requirements of the site, and you should put in your mind the type of site either static or dynamic then you define where you should change.